Fatto generale: 98498 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 98498 is a boring number.
Trivia: 98498 is an unremarkable number.
Data storica: September 4th is the day in 626 that Li Shimin, posthumously known as Emperor Taizong of Tang, assumes the throne over the Tang Dynasty of China.